[INFO] cloning repository https://github.com/trinitronx/rust-understanding-ownership [INFO] running `Command { std: "git" "-c" "credential.helper=" "-c" "credential.helper=/workspace/cargo-home/bin/git-credential-null" "clone" "--bare" "https://github.com/trinitronx/rust-understanding-ownership" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership", kill_on_drop: false }` [INFO] [stderr] Cloning into bare repository '/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership'... [INFO] running `Command { std: "git" "rev-parse" "HEAD", kill_on_drop: false }` [INFO] [stdout] 57778d31155d6500a7cecc437d5dc85fcf3a1d2b [INFO] testing trinitronx/rust-understanding-ownership against master#ebf0cf75d368c035f4c7e7246d203bd469ee4a51 for pr-137940-2 [INFO] running `Command { std: "git" "clone" "/workspace/cache/git-repos/https%3A%2F%2Fgithub.com%2Ftrinitronx%2Frust-understanding-ownership" "/workspace/builds/worker-7-tc1/source", kill_on_drop: false }` [INFO] [stderr] Cloning into '/workspace/builds/worker-7-tc1/source'... [INFO] [stderr] done. [INFO] validating manifest of git repo https://github.com/trinitronx/rust-understanding-ownership on toolchain ebf0cf75d368c035f4c7e7246d203bd469ee4a51 [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--manifest-path" "Cargo.toml" "--no-deps", kill_on_drop: false }` [INFO] started tweaking git repo https://github.com/trinitronx/rust-understanding-ownership [INFO] finished tweaking git repo https://github.com/trinitronx/rust-understanding-ownership [INFO] tweaked toml for git repo https://github.com/trinitronx/rust-understanding-ownership written to /workspace/builds/worker-7-tc1/source/Cargo.toml [INFO] crate git repo https://github.com/trinitronx/rust-understanding-ownership already has a lockfile, it will not be regenerated [INFO] running `Command { std: CARGO_HOME="/workspace/cargo-home" RUSTUP_HOME="/workspace/rustup-home" "/workspace/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "fetch" "--manifest-path" "Cargo.toml", kill_on_drop: false }` [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "metadata" "--no-deps" "--format-version=1", kill_on_drop: false }` [INFO] [stdout] f64fef04ebd1b045d39e61c6c5bbc486ce8ad8a968224559a97db6a6e9e90dab [INFO] running `Command { std: "docker" "start" "-a" "f64fef04ebd1b045d39e61c6c5bbc486ce8ad8a968224559a97db6a6e9e90dab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "inspect" "f64fef04ebd1b045d39e61c6c5bbc486ce8ad8a968224559a97db6a6e9e90dab", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "f64fef04ebd1b045d39e61c6c5bbc486ce8ad8a968224559a97db6a6e9e90dab", kill_on_drop: false }` [INFO] [stdout] f64fef04ebd1b045d39e61c6c5bbc486ce8ad8a968224559a97db6a6e9e90dab [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "build" "--frozen" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 49fdfcfca0727990d1fd11afc596b6bbd5a45a24fcbc555d9e0addf4e6262589 [INFO] running `Command { std: "docker" "start" "-a" "49fdfcfca0727990d1fd11afc596b6bbd5a45a24fcbc555d9e0addf4e6262589", kill_on_drop: false }` [INFO] [stderr] Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/main.rs:154:9 [INFO] [stdout] | [INFO] [stdout] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/main.rs:159:9 [INFO] [stdout] | [INFO] [stdout] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:262:13 [INFO] [stdout] | [INFO] [stdout] 262 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:265:9 [INFO] [stdout] | [INFO] [stdout] 265 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:270:9 [INFO] [stdout] | [INFO] [stdout] 270 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:353:9 [INFO] [stdout] | [INFO] [stdout] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `dev` profile [unoptimized + debuginfo] target(s) in 0.39s [INFO] running `Command { std: "docker" "inspect" "49fdfcfca0727990d1fd11afc596b6bbd5a45a24fcbc555d9e0addf4e6262589", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "49fdfcfca0727990d1fd11afc596b6bbd5a45a24fcbc555d9e0addf4e6262589", kill_on_drop: false }` [INFO] [stdout] 49fdfcfca0727990d1fd11afc596b6bbd5a45a24fcbc555d9e0addf4e6262589 [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen" "--no-run" "--message-format=json", kill_on_drop: false }` [INFO] [stdout] 5f3caa27509c06dbdacfa74cf1932f902bc6a4a457c34809317be2ce8976726c [INFO] running `Command { std: "docker" "start" "-a" "5f3caa27509c06dbdacfa74cf1932f902bc6a4a457c34809317be2ce8976726c", kill_on_drop: false }` [INFO] [stderr] Compiling understanding-ownership v0.1.0 (/opt/rustwide/workdir) [INFO] [stdout] warning: unused variable: `s1` [INFO] [stdout] --> src/main.rs:154:9 [INFO] [stdout] | [INFO] [stdout] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_variables)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `s3` [INFO] [stdout] --> src/main.rs:159:9 [INFO] [stdout] | [INFO] [stdout] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r1` [INFO] [stdout] --> src/main.rs:262:13 [INFO] [stdout] | [INFO] [stdout] 262 | let r1 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `r2` [INFO] [stdout] --> src/main.rs:265:9 [INFO] [stdout] | [INFO] [stdout] 265 | let r2 = &mut s; [INFO] [stdout] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: variable does not need to be mutable [INFO] [stdout] --> src/main.rs:270:9 [INFO] [stdout] | [INFO] [stdout] 270 | let mut s = String::from("hello"); [INFO] [stdout] | ----^ [INFO] [stdout] | | [INFO] [stdout] | help: remove this `mut` [INFO] [stdout] | [INFO] [stdout] = note: `#[warn(unused_mut)]` on by default [INFO] [stdout] [INFO] [stdout] [INFO] [stdout] warning: unused variable: `word` [INFO] [stdout] --> src/main.rs:353:9 [INFO] [stdout] | [INFO] [stdout] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stdout] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stdout] [INFO] [stdout] [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.35s [INFO] running `Command { std: "docker" "inspect" "5f3caa27509c06dbdacfa74cf1932f902bc6a4a457c34809317be2ce8976726c", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "5f3caa27509c06dbdacfa74cf1932f902bc6a4a457c34809317be2ce8976726c", kill_on_drop: false }` [INFO] [stdout] 5f3caa27509c06dbdacfa74cf1932f902bc6a4a457c34809317be2ce8976726c [INFO] running `Command { std: "docker" "create" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/target:/opt/rustwide/target:rw,Z" "-v" "/var/lib/crater-agent-workspace/builds/worker-7-tc1/source:/opt/rustwide/workdir:ro,Z" "-v" "/var/lib/crater-agent-workspace/cargo-home:/opt/rustwide/cargo-home:ro,Z" "-v" "/var/lib/crater-agent-workspace/rustup-home:/opt/rustwide/rustup-home:ro,Z" "-e" "SOURCE_DIR=/opt/rustwide/workdir" "-e" "CARGO_TARGET_DIR=/opt/rustwide/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=forbid" "-e" "RUSTDOCFLAGS=--cap-lints=forbid" "-e" "CARGO_HOME=/opt/rustwide/cargo-home" "-e" "RUSTUP_HOME=/opt/rustwide/rustup-home" "-w" "/opt/rustwide/workdir" "-m" "1610612736" "--user" "0:0" "--network" "none" "ghcr.io/rust-lang/crates-build-env/linux@sha256:1680c8fbd8dfb46fcd6d22e546df16ab0e007457dc29fcd9e987cdd5077fd1af" "/opt/rustwide/cargo-home/bin/cargo" "+ebf0cf75d368c035f4c7e7246d203bd469ee4a51" "test" "--frozen", kill_on_drop: false }` [INFO] [stdout] 8c27cbcc23afb8bf3e587efec4e37960b1b165656c592bf1a6f70d4e105bab65 [INFO] running `Command { std: "docker" "start" "-a" "8c27cbcc23afb8bf3e587efec4e37960b1b165656c592bf1a6f70d4e105bab65", kill_on_drop: false }` [INFO] [stderr] warning: unused variable: `s1` [INFO] [stderr] --> src/main.rs:154:9 [INFO] [stderr] | [INFO] [stderr] 154 | let s1 = gives_ownership(); // gives_ownership moves its return [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s1` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_variables)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `s3` [INFO] [stderr] --> src/main.rs:159:9 [INFO] [stderr] | [INFO] [stderr] 159 | let s3 = takes_and_gives_back(s2); // s2 is moved into [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_s3` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r1` [INFO] [stderr] --> src/main.rs:262:13 [INFO] [stderr] | [INFO] [stderr] 262 | let r1 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r1` [INFO] [stderr] [INFO] [stderr] warning: unused variable: `r2` [INFO] [stderr] --> src/main.rs:265:9 [INFO] [stderr] | [INFO] [stderr] 265 | let r2 = &mut s; [INFO] [stderr] | ^^ help: if this is intentional, prefix it with an underscore: `_r2` [INFO] [stderr] [INFO] [stderr] warning: variable does not need to be mutable [INFO] [stderr] --> src/main.rs:270:9 [INFO] [stderr] | [INFO] [stderr] 270 | let mut s = String::from("hello"); [INFO] [stderr] | ----^ [INFO] [stderr] | | [INFO] [stderr] | help: remove this `mut` [INFO] [stderr] | [INFO] [stderr] = note: `#[warn(unused_mut)]` on by default [INFO] [stderr] [INFO] [stderr] warning: unused variable: `word` [INFO] [stderr] --> src/main.rs:353:9 [INFO] [stderr] | [INFO] [stderr] 353 | let word = first_word(&s); // word will get the value 5 [INFO] [stderr] | ^^^^ help: if this is intentional, prefix it with an underscore: `_word` [INFO] [stderr] [INFO] [stderr] warning: `understanding-ownership` (bin "understanding-ownership" test) generated 6 warnings (run `cargo fix --bin "understanding-ownership" --tests` to apply 1 suggestion) [INFO] [stderr] Finished `test` profile [unoptimized + debuginfo] target(s) in 0.02s [INFO] [stdout] [INFO] [stderr] Running unittests src/main.rs (/opt/rustwide/target/debug/deps/understanding_ownership-60e58babe567bafe) [INFO] [stdout] running 0 tests [INFO] [stdout] [INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s [INFO] [stdout] [INFO] running `Command { std: "docker" "inspect" "8c27cbcc23afb8bf3e587efec4e37960b1b165656c592bf1a6f70d4e105bab65", kill_on_drop: false }` [INFO] running `Command { std: "docker" "rm" "-f" "8c27cbcc23afb8bf3e587efec4e37960b1b165656c592bf1a6f70d4e105bab65", kill_on_drop: false }` [INFO] [stdout] 8c27cbcc23afb8bf3e587efec4e37960b1b165656c592bf1a6f70d4e105bab65